Cutter blade



FIG. 1 is a top view of the cutter blade showing our new design;

FIG. 2 is a cross-section view taken through line 2-2 of FIG. 1 showing the middle undulation;

FIG. 3 shows a front end view of FIG. 1; and,

FIG. 4 shows an enlarged portion of Detail A shown in FIG. 3.

Any surfaces of the design not shown, including interior surfaces and any surfaces shown in broken lines, form no part of the claimed invention. 

CLAIM We claim the ornamental design for a cutter blade, as shown and described. 